How to Hack OS X System and/or iOS System

I am a newbie hacker. All I've done is install Kali Linux on VM Vitural Box.

Now I'm trying to remotely install a keylogger into the OS X system (a MacBook), and do the same with an iPad running iOS.

Both devices are far away from me (I mean they're not connected in the same network with me).

So I want to ask for what article/tutorial I should read for doing that hack. I've read a lot of tutorial on Null-Byte, but I'm messed up since I don't know where to start.